Note 8 - Basic and Diluted Net Income (Loss) Per Share (Details Textual) - shares	3 Months Ended			6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Weighted Average Number of Shares Outstanding, Basic, Total (in shares)	3,875,431	3,875,431	3,875,431	3,875,000	3,875,431
Weighted Average Number of Shares Outstanding, Assuming Dilution (in shares)			3,893,956		3,918,225